I've tracked mileage for the past 3 years and am disappointed in myself every year. (My low mileages may have something to do with the amount of mountain biking I do.) This year, I'm not tracking mileage. Instead, I'm going to:

1. Focus on tracking time (days per week, and hours on any bike).
2. Complete my first XC race season (probably 3-4 races, and maybe a relay or enduro race), with absolutely no pressure to win anything.
3. Focus on the social side of riding more than the quantitative side, and do more road and mountain group rides.
4. Finish building my new mountain bike and sell my old one to defray the cost.